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https://issues.apache.org/jira/browse/SOLR-1757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Henson updated SOLR-1757:
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Attachment: solr-1352-threads-bt.txt
This is the backtrace I get with this NPE. The backtrace is always the same,
though I haven't confirmed whether or not it happens with the same data or
after the same number of rows have been processed. The redacted part of the
backtrace looked normal - no missing fields, no empty values.
> DIH multithreading sometimes throws NPE
> ---------------------------------------
>
> Key: SOLR-1757
> URL: https://issues.apache.org/jira/browse/SOLR-1757
> Project: Solr
> Issue Type: Bug
> Components: contrib - DataImportHandler
> Affects Versions: 1.4
> Environment: tomcat 6.0.x, jdk 1.6.x on windows xp 32bit
> Reporter: Michael Henson
> Attachments: solr-1352-threads-bt.txt
>
>
> When the "threads" attribute is set on a root entity in the DIH's
> data-config.xml, the multithreading code sometimes throws a
> NullPointerException after the full-index command is given.
> I haven't yet been able to figure out exactly which reference holds the null
> or why, but it does happen consistently with the same backtrace.
> My configuration is:
> 1. Multi-core Solr under tomcat
> 2. Using JdbcDataSource and the default SqlEntityProcessor
> To reproduce:
> 1. Add the attribute threads="2" to the root entity declaration in
> data-config.xml
> 2. Send the full-import command either directly to
> .../core/dataimport?command=full-import or through the /admin/dataimport.jsp
> control panel.
> 3. Wait for the NPE to show up in the logs/console
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